Should corn topdressing be before rain or after rain? When is the best topdressing time?

Should corn topdressing be before rain or after rain? When is the best topdressing time? Generally speaking, when corn grows to 6-8 leaves, it is the jointing stage of corn, so it will rain. Once the weather forecast says there will be moderate to heavy rain, some farmers will bring fertilizer to spread in the fields. It is best to fertilize before it rains. But the weather changes quickly in summer, and the weather forecast is sometimes inaccurate. At this time, farmers are waiting for the rain to spread. Some farmers sow seeds after the rain. There are various methods, such as fertilizing one by one, sowing evenly along the corn ridge and chasing rain.

No matter before, during and after the rain, the effect of fertilization is very good, mainly how to apply it and how to use different fertilizers at different stages. Generally, high-nitrogen compound fertilizer is applied before and after rainfall, and soil burial method is adopted. Because the high-nitrogen compound fertilizer melts slowly, it can prevent the increase of nutrients. So I chose the way of burial. If fertilizer is applied in the rain, mainly nitrogen fertilizer, such as urea, urea melts in water and penetrates into the soil faster. If urea is applied after rain, the wet soil will dissolve slowly, and the sunlight will increase, which is not conducive to plant absorption. Because we are on the plain, there are wheat bran and broken straw fragments in the field. Generally, there will be no water in the corn field, and fertilizer and water will not flow to the fields of foreigners.

When planting corn, you will choose to apply base fertilizer. When planting corn, it will be fertilized together, which is convenient and fast. In the middle and late stage, few people use the fertilizer applicator to topdressing, because it is not spring corn, and the field is clean and there is no sundries. When sowing corn in summer, there are a lot of sundries in the field, which leads to dense corn and troublesome fertilization. Generally speaking, when it rains and fertilizes, urea is artificially applied, some in barrels and some in pots, and two people chase a few acres of land for a period of time.

Although the base fertilizer is sufficient, it is suggested to topdressing some nitrogen fertilizer in the middle and late stage, generally about per mu 10 kg. Don't waste too much, it will affect the maturity of corn. The topdressing time should be about corn leaves 10. When the rainfall is moderate or heavy, topdressing is not recommended when the rainfall is small. However, it is not easy for farmers to cultivate, especially when topdressing corn. The leaves of corn are very rough, and it is really uncomfortable to sweat when it rains.

Optimum topdressing time of maize

The optimum topdressing period of maize is 2 leaves 1 heart to 6 leaves 1 heart. Generally speaking, in the process of corn planting, high nitrogen urea is mainly used as topdressing. Although urea is a high concentration nitrogen fertilizer, it is easily soluble in water, but it will be quickly decomposed by rain in rainy days, so rainfall is very important. If the rainfall is small, it is best to apply it before it rains. If it is heavy rain, it is best to apply it after the rain to prevent the fertilizer from being washed away by the rain.